I upgraded my Ap910c's with the 1.2.0 firmware (deemed critical, update now), now all my wireless clients (Android phones/tablets, iOS devices) keep disconnecting and reconnecting over and over. tried downgrading one of the AP's to 1.1.7, now it won't come back online.

As a test, reset to factory, reinstall older f/w and restore the backup config from that old f/w

Thanks for your reply.

Eventually I was able to get back into the AP. Both my Ap910c's are still having problems. I also updated an AP-902 which is working fine.

I'll try the reset and re-install soon.

Meanwhile, I will get some information from the system logs. On the affect wireless Android clients they all say 'authentication failed', and keep trying to connect over and over. I've recreated the AP settings on them but the problem continues. My Windows 10 devices and other wireless devices such as a Logitech Squeezebox are unaffected.

thank you admin. Your advice worked. I reset to factory default, downgraded to 1.1.7, then restored my config files. It's all working fine now, no problems with mobile device clients any more.

Here's a sample from the syslog of one of the AP910c's with firmware 1.2.0....

Jan 30 16:00:10 kernel: TXRX: ol_txrx_peer_find_add_id: peer 81efd000 ID 175 vid 0 mac d0:87:e2:34:9f:48
Jan 30 16:00:10 kernel: Negotiated: txrates = fffe rxrates = fffe
Jan 30 16:00:10 kernel: 140, 18, 152, 36, 176, 72, 96, 108,
Jan 30 16:00:10 kernel: After: 0 1 2 3
Jan 30 16:00:10 kernel: 0, 1, 2, 3, 4, 5, 6, 7,
Jan 30 16:00:10 kernel: ASSOC SUCCESS: MAC:d0:87:e2:34:9f:48
Jan 30 16:00:10 kernel: ht numrates 8 , vht mcs set 0xfffe maxratevht 0xff
Jan 30 16:00:10 kernel: PHYMODE=0xa NSS=1 FLAGS=0x6013006 max_mpdu=1048575
Jan 30 16:00:10 kernel: Node Added (NC = 1)
Jan 30 16:00:10 kernel: wmi_unified_event_rx : no registered event handler : event id 0x901c
Jan 30 16:00:10 kernel: [ieee80211_ioctl_setmlme] non sta mode, skip to set bssid
Jan 30 16:00:10 kernel: Unicast Keyidx set=5
Jan 30 16:00:10 kernel: wmi_unified_vdev_install_key_send Setting Key for Macaddress:0x489f34e287d0
Jan 30 16:00:10 kernel: Keyix=0 Keylen=16 Keyflags=0 Cipher=4
Jan 30 16:00:10 kernel: Keydata=0x31 0x21 0xb2 0x3b 0xa4 0x44 0xc3 0x88 0x6d 0x7b 0x88 0xc3 0x3f 0x74 0x62 0xa1
Jan 30 16:00:10 kernel: TXRX: sec spec for peer 81efd000 (d0:87:e2:34:9f:48): ucast key of type 6
Jan 30 16:00:10 kernel: FWLOG: [37094280] RATE: ChainMask 1, phymode 10, ni_flags 0x06013006, vht_mcs_set 0xfffe, ht_mcs_set 0x00ff, legacy_rate_set 0x23603cf
Jan 30 16:00:10 kernel: FWLOG: [37094351] WAL_DBGID_SECURITY_UCAST_KEY_SET ( 0x0 )
Jan 30 16:00:10 kernel: FWLOG: [37094351] WAL_DBGID_SECURITY_ENCR_EN ( )
Jan 30 16:00:10 kernel: FWLOG: [37094351] WAL_DBGID_SECURITY_ALLOW_DATA ( 0x434d74 )
Jan 30 16:00:40 kernel: Node deleted (NC = 0)
Jan 30 16:00:40 kernel: wmi_unified_vdev_install_key_send Setting Key for Macaddress:0x489f34e287d0
Jan 30 16:00:40 kernel: Keyix=0 Keylen=16 Keyflags=0 Cipher=0
Jan 30 16:00:40 kernel: Keydata=0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0
Jan 30 16:00:40 kernel: TXRX: sec spec for peer 81efd000 (d0:87:e2:34:9f:48): ucast key of type 0
Jan 30 16:00:40 kernel: TXRX: ol_rx_peer_unmap_handler: peer 81efd000 with ID 175 to be unmapped.
Jan 30 16:00:41 kernel: FWLOG: [37125730] WAL_DBGID_SECURITY_UCAST_KEY_SET ( 0x0 )
Jan 30 16:00:42 kernel:
Jan 30 16:00:42 kernel: Athr: Remove associated mac: D087E2349F48 from switch table...
Jan 30 16:00:42 kernel: TXRX: ol_txrx_peer_find_add_id: peer 81efd000 ID 175 vid 0 mac d0:87:e2:34:9f:48
Jan 30 16:00:42 kernel: Negotiated: txrates = fffe rxrates = fffe
Jan 30 16:00:42 kernel: 140, 18, 152, 36, 176, 72, 96, 108,
Jan 30 16:00:42 kernel: After: 0 1 2 3
Jan 30 16:00:42 kernel: 0, 1, 2, 3, 4, 5, 6, 7,
Jan 30 16:00:42 kernel: ASSOC SUCCESS: MAC:d0:87:e2:34:9f:48


I've no idea what any of this stuff means! All my Android devices are all on 6.0.1. They are all connecting fine now the AP is at 1.1.7.

FW 1.2.0 borked 5 of my 910Cs....
I wish I knew more details about WHAT the critical update addressed (mirai varient?) because the only choice I have at the moment is downgrade.